1-chloro-6-methoxy-4-methyl-xanthen-9-one 、
N-[2-(diethylamino)ethyl]hydrazine 以was obtained 2-(2-(diethylamino)ethyl)-8-methoxy-5-methyl-2H(1)benzopyrano[4,3,2-cd]indazole的产率得到2-(2-(diethylamino)ethyl)-8-methoxy-5-methyl-2H(1)benzopyrano[4,3,2-cd]indazole